Calculating-machine.



S. J. HERZSTARK.

GALGULATING MACHINE.

APFLIOATIOH YILED DEO. Z2, 1908. 1,058,303. Patented Apr. s, 191s.

2 SHEETS-SHEET 2.

I' v i fifa/'725% 'I Y sirATEs PATENT OFFICE.

Y SMUEL JAKOB HERZSTARK, GF VIENNA, AUSTBI'A-HUNGARY.

. cALcULATING-MAGHNE.

TQQ-158,303. .y

To'all .may concern.' v

y Be it known that I, SAMUEL JAKoB HERZ- smak, a 1subject of the Austro-Hungarian,

i' -'Emperor, andfresident of'Vienna, V, Aus- -tria-Hungary, have invented anlmproved -Galculating-Machine, of which the following is -a specification.

The lpresent invention relates to an iin--y Vproved typev of `calculating machine.

After vcalculating machines had been knownand' in use for some time, a defect began to be discovered when doing certain "calculations, This drawback lay in the fact thatonly hone of the operations of addition, subtraction, multiplication and division l'could be performed at a time, whileI a machine was greatlyv desired by means of which two operations could be performed simul- A' by *the couplings, and are more liable to operator only kdesires to actuate one of the breakv vdown while the' calculating gear of both-machines must be actuated when the mechanisms showing the result. The latter .drawback can only .be obviated by uncoua,

pling, an operation which wastes a lot of time. #This disadvantage is spec1ally obyvious, in the machines ofthe Thomas type constructed with double calculating gear,

' asin this case'the mechanism for indica-ting the result must not only be uncoupled,'but must also `be/lifted out of the mechanism driving-.the calculating gear which latter, as' already statedl annot be put out of action.. This enforce vremovalof the calculat- 'ingmechanismla-ysjit open to outside mfluences,-isuchas dust, dampfetc.` 4

l.The objectaofgthis :invention-.isto combine .two calculating .machines of. the known.

.Thomasitypeyin; such a waythat they can be. made. .to` operate'independently lof: one another at-fwill. In this' invention :two

`Wlmse'calculating and result -lshowing mech- `4 .anism act ,fexaetly as intheusual fThomas machine, are combined. The mechanisms for scttingithe ,on each machine are com- Specication of Letters Patent.

Patented Apr. 8, 191,3.

Application iled December 22, 1908; i Serial No. l168,733.

bined, so as to Work together, and the mechamsm for actuating this gear is so arranged as -to w'ork together or separately. The machine is therefore not merely a machine with two calculating devices, buta combination of two complete Thomas machines, which can be driven together or separately. The machines are combined by arranging them one above the other, the calculating gear of the lower machine,'protruding under the upper one, lso as to be visible.

In the accompanying drawings :-Figure 1 shows a front view of the machine. Fig. 2` is a plan of Fig. 1. Fig. 3V is a side view of F ig; 1, looking from the left.V Fig..4 is a` view of Fig. 1 as seen from the right. Fig. 5 represents a detail. Fig. 6 is a cross section of Fig. 5.

The two Thomas machines I and II are placed one above' the other in such a way that they are arranged on common vertical frame-plates7 as s cen by Fig. 3. The` spindles 4 of the calculating mechanism, of the lower machine are prolonged so that the i ligure board 2 of the lower machine projects beyond figure board 3, of the up er one. (Figs. 3 and 4.) The driving spindles 5I of both machines are. connected together by a common crankshaft 6, upon which is fixed' the crank 7, so that when this crank is ro- `tated, both machines are actuated. In order to be able tofuncouple one machine and to continue calculating with the other one alone7 one of the bevel wheels 8 is made axially movableon the shaft 6. A forked arm 9 fastened to a lever 10 engages in the hub of the wheel 8. The lever 10 is fastened to' a handlever 12 by means of a connecting rod 11. When lthe hand-lever 12 is in the position shown dotted in Figs. 3 and 4, the fshaft 5 of the lower machine 2 is positively coupled to the crank shaft 6, through the correspondingl bevel wheelS. If on the otherlhand the g lever 12 is moved-into the position shown full in Figs. 3 and 4,;one of the bevel wheels A8,is movedaxiallyand vthereby thelower machinel isuncoupled vand the upper machine coupled.- The devices-.fr settingv thefigures on both machines, .areifsuit'ably connected so 'that both canibe actuated simultaneously by I1-works alone, IIt can offcourseeasily.,beff

the common slide 13 For this purposethe. v

toothed racks 14 .of the upper machine I are connected to the similar racks 15 of the lower t4 the shafts 16, on wheels 17 which acks.

simultaneously. rlhe bar 18 is hinged to the lower figure board 2 at the point 19 and its upper end is laid between two guidepins 21 ,on the upper board 3. A T shaped bolt 20 is fitted on the bar 18 with its cross piece under the bent up hook like hinges, thereby holding the bar 18 firmly onto the figure board so that the bar cannot be raised till t-he bolt 20 is pushed back, whereupon the two figure boards can be moved independently oi?- each other.

The two calculating mechanisms can be reversed independently of each other in a well-known manner by means ot two respective levers 22 on the setting plate, which are pivotally connected each by a bar 27 to a fork 28, which latter engages the reversing bevel wheels of the respective calculating mechanism. In order` to prevent the coupling mechanism of one machine being operi ated in case the lever 7 is allowed to remain out of its normal position, a disk 2a provided with a slot 23 is fitted on the crank shaft. 6 (Figs. 1 and 5). A locking pin 25 is fitted on the lever 10. These parts are so arranged that the locking pin, which issi'tuated inthe respective end positions ofy coupling mechanism above and Vbelow," vhe disk 24, engages in the' slot 23 'in the llat-ter during the. engagement or disengagement of the coupling, 'it' the hand lever is Pin its normal position; It, however, this lever is allowed to remain in any other position, the pin 25 strikes against the disk and prevents the. motion ot' the coupling. In this manner the machines can only be coupled'or uncoupied Ifrom one another, if the mechanism for setting the figures on both machines are in similar positions. Having fully described my invention, vwhat I claim and desire to secure by Letters Patent is y 1. An improved calculating machine, comprising in combination two complete calculating machines, arranged one above the other, each of said machines comprising a 'calculating mechanism, consisting of slides for setting the figures, result showing mechanism, toothed racks 14 on the upper andv lower machines .and steprolls', :operating the result showing mechanism, means for connecting the ligure-boards of both machines, the steprolls and the result showing mechanism being combined by bevel wheels with a. driving spindle 5 in such a manner,V as to be rotated simultaneously, the two driving spindles 5 of the two machines being connected by bevel-wheels 8 to a common driving shaft 6 having a crank 7 for operating simultaneously the two calculating mechanisms, one of the wheels 8 being slidable on the shaft 6 by means of a hand-lever 1.2, engaging said wheel 8, so that the lever 12 can move said slidable wheel axially, thereby vsetting the ligures, result showing mecha- 'msm and step-rolls, operating the result showing mechanism., both the steprolls and this result showing mechanism being com bined by bevel wheels with a driving spindle 5, the driving spindles of both machines bcing geared to a common drivin@ shaft 6, having a crank 7, means for connectinethe i"igure-boards of both machines, toothed racks 14. Yon the upper and lower machines, said toet-hed racks being driven together by means of toothed wheels 17 engaging with both racks and the toothed racks of the upper machine being connected each to its respective slide 13, substantially as described and shown.

3. An improved calculating machine, com- ,prising in combination two complete calculating machines, each of said machines comprising a calculatingfngechanism, consisting ont slides for setting theiigures, result showing mechanism, toothed racks on the 'two machines and steprol ,operating the result showing mechanism, two driving spindlest, actuating the steprollsand the result showing 1nechanism, a-common driving shaft 6 and crank 7 for operating the two driving spindles 5, thetwo machines being adapte to be operated singly or. together as desu by means for actuating the iigure setting vices et both macliines sin'iultaneously .fa by means 'or connecting the tigurel oards both machines, so that they are raised simultaneously, substantially as described and shown. n

4. An improved calculating machine comprising in combination two complete calculating machines, said machines being arranged one above the other and each ot' the same comprising a calculating mechanism, consisting of slides for setting the figures, result showing mechanism and'steprolls, operating the result showing mechanism, toothed racks on the upper and lower machines, a drivingv spindle 5 on each machine, a common driving shaft 6 :tor the two spindies 5, the two machines being adapted to be operated singly or together as desired by' means for connecting the figure boards of both machines, said means consisting of a bar 18, hinged to the figure board 27.01": one

.machine, guides 21 on the other ligure board between which said bar engages, substantially 'as described and shown.y

5. An improved calculating machine, comprising in combination two complete calculating machines, said machines being ar.- ranged one above the other and each of the same comprising' a calculating mechanism,

consisting of slidesfor setting the figures, 10

dles 5,the two machines being adapted to be operated singly or together as desired, means for actuatingy the 'ligure -setting devices of both machinessimultaneously, la bar 18 connecting the figure'boards of the two machines, said bar being hinged to the figure 4board 2 of one machine, guides 21 on the ether ligure board between which said bar engages, a bolt 20, holding said bar. 18 downonsaid figure board 2, said bolt being arranged so that after moving the bolt, said barfcan be swung back, thus uncoupling the fwofigure boards, substantially as described `and shown.. Y

f6.' An improvedcalculatmg machine, comprising in combination two complete ca1cu- -lating machines arrangedV ne t'above the other and each of the same comprising a calculating mechanism, consisting ofslides for setting the figures, result shojiing mechanism and steprolls, operating the result showing mechanism, ltoothed racksA on the' upper and lower machines, a drivin spindle 5 on each machine, :grommen driving shaft 6 for the two spindles 5,'Jtheftwo machines being adapted to be operated singly or together as desired, means for actuating the `figure settingdevices ofv bothmachines simultaneously, means for'detachably connecting the :ligure boards of both machines, a disk on the driving shaft, said disk having a slot 23, a pin connected to said lever 12h4 by suitable connected rods, said pin being adapted to strike said disk and prevent the machine from being coupled or uncoupled unlessthe mechanisms for setting the figures on both machines are in similar positions, substantially as described and shown.

In testimony whereof I aflix my signature in presence of two witnesses.

SAMUEL JAKOB HERZSTARK. Witnesses:

AmRED lBEROM, ROBERT W, HEINGARTNER. 

